Oops, try again. It looks like you have a NameError. Maybe you forgot to create a function called distance_from_zero? Check the error message for more info! - global name 'distance_from_zero' is not defined

Sorry if that sounds like a dumb thing to ask you to check. I know asking about the indention's basically the equivalent of tech support asking if you turned it on and off again but python's picky about white space.